Aloe: Southern Asia, Arabia, southern Africa. Cultivated in southern Europe, northern Africa, British West Indies.
Order LX.—Palmæ: Shrubs and small and large trees; one hundred and thirty-seven genera.
Areca (betelnut): Sunda Isles, Philippines, Cochin-China, Sumatra, southern India.
Cocos (cocoanut): East India Archipelago, Arabia, Persia, Malay. Cultivated in eastern Africa, western America, Brazil, West Indies, islands of Central America.
Metroxylon (sago palm): Malacca, southern China. Cultivated in Eastern Archipelago.
Phœnix (date palm): Between 15° and 30° north latitude, from Atlantic Coast to the River Indus; Sahara oases. Cultivated in Acre, Palmyra, Jaffa.
Order LXI.—Gramineæ: Herbs; one thousand two hundred and ninety-eight genera.
Avena (oats): West central Asia, east central Europe. Cultivated in Scotland, Ireland, Norway, Canada, United States.
Hordeum (barley): Annual. Temperate western Asia. Cultivated in northern Russia, Siberia, etc.